Bis-triazinylaminostilbene compounds

ABSTRACT

CERTAIN 4,4&#39;&#39; - BIS(4&#34;-(2.6-DIMETHYLMORPHOLINO)-1&#34;,3&#34;, 5&#34;-TRIAZINYL-(2&#34;)-AMINO)-STILBENE-2,2&#39;&#39; - DISULFONIC ACIDS ARE USEFUL FOR THE OPTICAL BRIGNTENING OF WASHING AGENTS SUCH AS ANIONIC AND NONIONIC DETERGENTS AND CELLULOSE MATERIAL AS WELL AS POLYMAIDE MATERIALS SUCH AS NYLON. REPRESENTATIVE COMPOUNDS ARE 4,4&#39;&#39;-BIS(4&#34;-(2,6-DIMETHYLMORPHOLINO)-6&#34;-PHENYLAMINO -1&#34;,3&#34;,5&#34; - TRAZINYL-(2&#34;)AMINO)-STILLBENE-2,2&#39;&#39;-DISULPHONIC ACID AND 4,4H-BIS(4&#34;(2.6 - DIMETHYLMORPHOLINO)-6&#34;-ETHOXY-1&#34;,3&#34;,5&#34;-TRIAZINYL(2&#34;)-AMINO)-STILLBENE-2,-&#39;&#39; -DISULPHONIC ACID.

United States Patent US. Cl. 252524 1 Claim ABSTRACT OF THE DISCLOSURE Certain 4,4 bis[4"-(2,6-dimethylrnorpholino)-1",3", 5"-triazinyl-(2")-amino]-stilbene-2,2' disulfonic acids are useful for the optical brightening of washing agents such as anionic and nonionic detergents and cellulose material as well as polyamide materials such as nylon. Representative compounds are 4,4-bis[4-(2,6-dimethylmorpholino)-6"-phenylamino l",3",5 triazinyl-(2")- amino]-stilbene-2,2',-disulphonic acid and 4,4'-bis-[4"- (2,6 dimethylmorpholino)-6"-ethoxy-l,3,5"-triazinyl- (2" -amino] -stilbene-2,2-disulphonic acid.

CROSS REFERENCE TO RELATED APPLICATIONS This application is a divisional application of our copending application Ser. No. 507,583, filed Nov. 12, 1965, now US. 3,459,743 which in turn is a continuation-in part of application Ser. No. 412,845, filed Nov. 20, 1964, now abandoned.

The present invention concerns new optical brighteners of the stilbene series, and a process for the production thereof. In a first aspect, the invention relates to a group of such new brighteners useful for the optical brightening of washing agents and of cellulose materials, in particular cotton textile materials as well as industrial products, the washing agents and cellulose materials having a content of the new optical brighteners.

In a second aspect, the invention relates to a group of the aforesaid new brighteners which are useful for the optical brightening of paper-type cellulose materials and for polyamide materials especially nylon as well as, as industrial products, the paper and polyamide materials of improved appearance having a content of the new optical brighteners.

Under the first aspect of this invention, valuable optical brighteners of the stilbene series are obtained by reacting 2 mols of 2,4,6-trihalogen-l,3,5-triazine, preferably the corresponding trichlorotriazine, in any order desired, with 1 mol of 4,4'-diaminostilbene-2,2-disulfonic acid or a salt thereof, with 2 mols of 2,6-dimethylmorpholine and with 2 mols of arylamine of the formula H NAr (I) wherein Ar represents unsubstituted phenyl or phenyl substituted by halogen or by lower alkyl, alkoxy or alkanoylamino groups, or the naphthyl-(l) radical, to form a compound of formula If Ar is halogen-substituted phenyl then this substituent is fluorine, chlorine or bromine; alkyl, alkoxy and alkanoylamino substituents of Ar preferably contain up to 6 carbon atoms. Preferably, however, Ar is the phenyl radical or a methylphenyl radical.

Preferably, 2,4,6-trihalogen-l,3,5-triazine is reacted in a first step with a soluble salt, for example with an alkali metal salt of 4,4-diaminostilbene-2,2-disulfonic acid and in the second and third steps with the 2,6-dimethyl morpholine and the arylamine of Formula I. However, the trihalogen-l,3,5-triazine can also be reacted in the second step with the 4,4-diaminostilbene-2,2'-disulfonic acid or a soluble salt thereof and in the first and third steps with 2,6-dimethyl morpholine and with arylamine. In any case, the first step of the reaction is preferably performed at a temperature of 0 to 10 C., the second step at 5 to C. and the third step at 60 to C. The reaction is advantageously performed in aqueous or aqueous-organic solution, the organic component of the solution consisting of lower aliphatic ketones such as acetone or methylethyl ketone or water soluble cyclic ethers such as dioxan, and in the presence of an acid binding agent such as alkali carbonates and alkali bicarbonates or alkali hydroxides. When 2,6-dimethyl morpholine is used in the last step of the reaction, it is advantageous to use an excess thereof, the excess serving as acid binding agent. If arylamine of Formula I is used for the third step of the reaction, then the reaction is advantageously performed in an acid medium, e.g. at a pH of 4 to 5.

The new stilbene compounds according to the invention, of Formula II, are advantageously isolated from the reaction mixture in the form of the alkali salts or the free disulfonic acids.

They are suitable chiefly for the optical brightening of washing agents. This distinguishes them from the known compounds corresponding in structure to those of Formula II, except that the morpholine radicals in the mole cule are unsubstituted. These known dyestuffs cause a vivid yellow discoloration of washing agents, which is most undesirable in the industry.

Suitable washing agents contain, as wash-active agents, for example anion active compounds, e.g. alkali metal salts, particularly sodium salts, of higher fatty acids, alkylaryl sulfonates, mainly dodecylbenzene sulfonate or tetrapropylbenzene sulfonate, sec. alkyl sulfates having a higher secondary alkyl radical, fatty alcohol sulfates such as dodecyl sulfate, or sulfated addition products of 2 to 3 mols of ethylene oxide to dodecyl alcohol, or non-ionic compounds such as fatty alcohol polyglycol ethers or higher alkylphenol polyglycol ethers. In addition, the washing agents can contain the usual fillers and auxiliaries usual in the textile finishing industry, for example, alkali polyphosphates and alkali polymetaphosphates, alkali silicates, alkali borates, alkali metal salts of carboxymethyl cellulose, foam stabilizers such as hydroxyalkylamides of higher fatty acids, or complex compounds such as soluble salts of ethylenediamine tetraacetic acid.

The washing agents are brightened by incorporating the stilbene compounds of Formula II according to the invention thereinto in the usual ways. This is done adwherein Ar has the meaning given in Formula I.

vantageously by stirring the stilbene compounds with the 3 washing agents in water to form a slurry and then drying the latter.

The white aspect of a detergent powder is very important to the detergent manufacturer as a control test. A discoloration of the detergent indicates that something has gone wrong during the production. Any detergent discoloration caused by the brightener would impede such a color control.

The content of optical brightener of Formula II according to the invention in the washing agent is advantageously 0.005 to 0.5% (calculated on the washing agent). Washing agents containing these optical brightwherein R represents hydrogen or a lower; optionally substituted,

alkyl group and R represents a lower, optionally substituted, alkyl group or an aryl, and especially a phenyl radical, which is substituted by lower alkyl-sulfonyl or by acid saltforming groups, more in particular sulfonic acid or carboxyl groups;

or R and R together with the nitrogen atom to which they are linked form a heterocyclic, N-containing ring,

to form a compound of the formula eners have a greatly improved, more white appearance in daylight than those not containing such brighteners.

The new stilbene compounds of Formula II draw onto cellulose material, particularly cotton, especially when free from synthetic resin finishes, from aqueous solution, particularly also from aqueous solutions containing washing agents of the type mentioned above. Their use on nylon and the like synthetic polyamide materials. is not recommended since they lack drawing power on such materials. Also on synthetic resin finished cotton and the like goods, the brighteners falling under the second aspect of this invention are to be preferred.

Aqueous textile treatment solutions preferably contain 0.001 to 0.2% of brightener of Formula II (calculated on the weight of the material to be brightened). Cellulose material treated with an aqueous solution containing such brighteners is given a pleasant, pure white, blue-violet fluorescent appearance.

Optical brighteners of Formula II according to the invention brighten washing agents considerably more strongly than previous known brighteners of a similar constitution. This is also true when the optical brighteners according to the invention are incorporated into the washing agents in the form of their aqueous or aqueous/ organic solutions. Another advantage of the brighteners according to the invention is that there is a good improvement in the degree of whiteness of the cellulose material, even after repeated washing, without any undesirable change in shade.

By cellulose material" as used in this application, there are meant both natural cellulose such as cotton, hemp, jute or ramie as well as regenerated cellulose such as staple fiber, or, especially in the second aspect of the invention, paper; by polyamide material is meant especially synthetic polyamide such as nylon, perlon.

Under the second aspect of the invention, valuable optical brightening agents of the stilbene series are obtained if 2 mols of 2,4,6-trihalogen-1,3,5-triazine, particularly 2,4,6-trichloro-1,3,5-triazine, is reacted in any order desired with 1 mol of 4,4'-diaminostilbene-2,2'-disu1fonic acid or a soluble salt thereof, with 2 mols of 2,6-dimethyl morpholine and, optionally, also with 2 mols of an optionally substituted lower alkanol, lower aliphatic mercaptan, ammonia or a primary or secondary amine of the formula E; (III) wherein X represents chlorine, an Optionally substituted lower alkoxy, lower alkylthio, the amino group or a substituted amino group of the formula wherein R, and R have the meanings given in Formula III.

If R, and R in Formula III represent a lower alkyl group then this, advantageously, has 1 to 4 carbon atoms. If this alkyl group is substituted, then the substituents are particularly those non-coloring substituents usual in brightening agents, i.e. the hydroxyl group, alkoxy groups having advantageously l to 4 carbon atoms, the sulfonic acid group, carboxylic acid group, sulfonic acid amide group, carboxylic acid amide group, or aromatic groups, mainly the phenyl group substituted as defined in connection with Formula IV. If R is an aryl radical substituted by acid salt-forming groups, then mainly the sulfonic acid group but also the carboxylic acid group or a disulfimide group are meant by acid salt-forming groups. The aryl group bearing these acid salt-forming groups can be additionally substituted by non-coloring substituents usual in optical brightening agents such as lower alkyl or alkoxy groups or halogen.

If R and R together with the nitrogen atom form a ring then this is, e.g. a five-membered ring such as the pyrrolidine ring, or a six-membered ring such as the piperidine, morpholine or 2,6-dimethyl morpholine ring.

If X is a lower alkoxy or alkylthio group then this advantageously has 1 to 4 carbon atoms. If these groups are substituted, then mainly the hydroxyl group or lower alkoxy groups are substituents.

The reaction of the 4,4'-diaminostilbene-2,2-disulfonic acid or a soluble salt thereof with the triazine compound is advantageously performed as a first or second step. The temperature for this condensation is, in the first step preferably 0 to 10 C., in the second step 0 to 60 C. and in the third step 60 to C. The condensation is advantageously performed in aqueous or aqueous-organic solution, the organic part of the solution consisting of lower aliphatic ketones such as acetone or methylethyl ketone, or water soluble cyclic ethers such as dioxan, and in the presence of an acid binding agent such as alkali carbonates, and alkali bicarbonates or alkali hydroxides. If 2,6- dimethyl morpholine or a non-aromatic amine of Formula III is reacted in the last step it is advantageous to use an excess thereof; the excess serves as acid binding agent. It

in that, even when large quantities are used, the material brightened therewith is not given an undesirable green tinge.

The following non-limitative examples illustrate the two aspects of the invention. Temperatures are given in degrees centigrade. Where not otherwise stated parts and percentages are given by weight. The relationship of parts by weight to parts by volume is as that of grams to milliliters.

a compound of Formula III, wherein R is an aryl group substituted by acid salt-forming groups, is reacted in the last step the reaction is advantageously performed in acid pH range, e.g. at a pH of 2 to 5.

Particularly suitable compounds of Formula IV are obtained by reacting 2 mols of 2,4,6-trihalogen-1,3,5-triazine with 1 mol of 4,4-diaminostilbene-2,2-disulfonic acid or a soluble salt thereof and 2 mols of 2,6-dimethyl morpholine without further reaction, or by further reacting with 2 mols of a lower alkanol or with 2 mols of an Example 1 aminobenzene sulfonic acid which may be substituted by chlorine, lower alkyl or lower alkoxy groups.

The new stilbene compounds of Formula IV according to the invention are advantageously isolated from the reaction mixture in the form of their alkali metal salts or free acids.

The new brighteners falling under this second aspect of the invention are especially suitable for the optical brightening of cellulose materials and synthetic polyamide material, on which materials they draw well from aqueous solution, especially from acid baths. They do so even in the cold, a property which is very important in paper manufacture.

As compared with known morpholino-substituted compounds of otherwise similar structure, these brighteners show on cellulosic material, including cotton, an unexpectedly improved wash fastness. Also their fastness to chlorine is very satisfactory.

The content of Whiteners of Formula IV in aqueous textile treatment liquors is advantageously 0.01 to 1.0% calculated on the weight of the material to be brightened. The cellulose material treated with an aqueous solution containing such brightener is given a pleasant, pure white appearance having a blue-violet fluorescence.

Particularly advantageous properties of the stilbene compounds according to this aspect of the invention, are their high grade substantivity, combined with their good stability to acids, e.g. acetic acid, and to salts which are conventionally used in textile finishing or paper production such as magnesium chloride, zinc chloride, zinc nitrate, zinc borotetrafiuoride or aluminum sulfate. The latter property is especially outstanding in those brighteners of Formula IV wherein X is an alkoxy group or a sulfophenyl-amino group. The new brighteners of Formula IV are hence useful in baths which contain precondensates suitable for the synthetic resin-finishing of cellulose materials, e.g. water-soluble methylol derivatives of urea or of other organic nitrogen compounds, as well as catalysts necessary for the polycondensation of such precondensates such as zinc chloride or magnesium chloride. Due to their good resistance to acid salts, e.g. aluminum sulfate, the new stilbene compounds are sitable for the brightening of sized paper in the pulp. This property is particularly ad- 75 parts of 2,4,6-trichloro-1,3,5-triazine are dissolved in 700 parts by volume of acetone. The solution is added to a mixture of 1800 parts of a mixture of ice and water while stirring. A solution of 82.2 parts of the sodium salt of 4,4-diamonstilbene-2,2-sulphonic acid and 21.5 parts of sodium carbonate in 950 parts of water is poured, Within 1 hour at -5, into the suspension of the triazine mentioned above while stirring well. At 15, a solution of 37.2 parts of phenylamine in 100 parts by volume of acetone is added dropwise to the yellowish suspension formed of the disodium salt of 4,4-bis-[4",6"-dichloro- 1",3,5" triaZinyl-(2)-amino]-stilbene-2,2'-disulphonic acid and the acid liberated is neutralised by the simultaneous addition of an aqueous solution of 22 parts of sodium carbonate. The yellowish suspension is then stirred at until the phenylamine has completely disappeared. At 6575, 58 parts of 2,6-dimethyl morpholine and an aqueous solution of 16 parts of sodium hydroxide are then added simultaneously within 15 minutes While stirring. On completion of the addition, the temperature of the reaction mixture is raised to 90 and the acetone is distilled off through a sloping condenser. After adding 4 parts of sodium hydroxide, the mixture is stirred for another hour at 90-100". In this way, a whiteish suspension of the disodium salt of 4,4-bis[4-(2,6-dimethylmorpholino) 6" phenylamine 1",3",5"-triazinyl-(2")- amino]-stilbene-2,2-disulphonic acid is obtained. After cooling, the product, which dissolves with ditficulty in water, is filtered off, washed once with water and dried in vacuo at 80.

An almost colourless powder which fiuoresces blue in UV light is obtained and which dissolves in dilute alcohol with a vivid violet-blue fluorescence. The product is suitable for the optical brightening of cellulose fibres in aqueous solution containing washing agents.

If instead of phenylamine, one of the arylamines given in column 2 of the following Table I is used and otherwise the procedure given in the example is followed, then optical brighteners are obtained having the appearance given in column 3.

vantageous lIl cases where so-called back water, which A I often contains a relatively high percentage of acid alumimp Arylamine Appearance num salt, is used for paper manufacture. 2-methylphenylamine Almost White powder.

The brightening of polyamide is preferably performed p y mine 2-chloro hen lamine 0. 1n an aqueous bath containing acids, e.g. formic or acet1c 3-methy lpher iylamine" Pale yellowish powder. acid 7 g-nglelthoxylpheriylamine D0.

' -e oxy en amine Do.

Another favourable property of e brlgh em g agents 8 3chl01'0p heny lamine Yellowish powder. according t thi aspect of the invention, and particularly 9 4methoxyPhenylamine:m- White Powder- 10 4-acetylarmnophenylamme Do.

those of Formula IV in which X represents alkoxy, resides Yellgwish powder.

dichloro 1",3",5" triazinyl-(2")-amino]-stilbene-2,2-

disulfonic acid in a mixture of water and acetone is produced as described in Example 1 from 75 parts of 2,4,6- trichloro-1,3,5-triazine, 82.2 parts of the sodium salt of 4,4'-diaminostilbene-2,2'-disulphonic acid and 21.5 parts of sodium carbonate. 50.5 parts of 2,6-dimethyl morpholine are poured in within minutes at 5-10". A aqueous solution of 55 parts of sodium carbonate is then added to the reaction mixture at 15 in such a way that this mixture has a pH of 8 to 9. A clear, yellowish solution is obtained. After adding 100 parts of sodium chloride, the whole is stirred for 12 hours at -30". The disodium salt of 4,4-bis-[4"-chloro-6"-(2,6-dimethylmorpholino)-l",3,5"-triazinyl (2") amino]-stilbene-2,2'- disulphonic acid forms a pale yellow precipitate which can easily be filtered off. After drying at 6570, the intermediate product is obtained as a yellowish, relatively easily water soluble powder.

15 parts of this intermediate product are distributed in 250 parts of water While stirring, 4.3 parts of 4 methylphenylamine are added, the pH of the mixture is adjusted to 5.5 by the addition of a few drops of concentrated hydrochloric acid and then the whole is refluxed for 6 hours 49 while stirring. The 4,4'-bis-[4"-(p-methylphenyl-amine)- 6"-(2,6-dirnethylmorpholino) 1",3",5 triazinyl-(2")- amino]-stilbene-2,2-disulphonic acid so formed separates out of the acid reaction solution as a yellowish precipitate. To convert it into the disodium salt, the product is filtered off, washed with water, suspended in 250 parts by volume of 20% alcohol and sufiicient aqueous sodium hydroxide solution is added at boiling temperature to raise the pH to 11-12. The disodium salt of the compound of the 55 formula given above forms a white, blue fluorescent, crystalline precipitate. After cooling, it is filtered off and dried in vacuo at 80. The compound so obtained has similar properties to those of the compound described in Example 1.

If the 4-methylphenylarnine is replaced by one of the arylamines given in column 2 of Table II and otherwise the procedure given in the example is followed, then a brightener is obtained the appearance of which is given in column 3 of the same table.

TABLE ll Example Arylanu'no Appearance 12 Zethoxyphenylaruine Yellowish powder (salted outwith NaOOCHa). 13 3-fluorophenylamine Pale yellowish powdert 14 3-bromophenylarnine Yellowish powder. 15 2,5-dimethylphenylamine Do. 16 3,E-dichlorOphonylarnlner Pale yellowish powder. 17 -ohlorophenylaniine White powder. 18 Naphthyl-(D-amine. Beige powder.

24.1 parts of 2,4-dichloro-6-phenylamino-1,3,5-triazine (produced by reacting 2,4,6-trichloro-1,3,5-triazine with an equivalent phenylamine) (J. T. Thurston, Am. Soc. 73, 2983 [1951]), are distributed in 250 parts of water and the suspension is heated to 60-65. At this temperature, a solution of 20.5 parts of the sodium salt of 4,4-diaminostilbene-2,2'-disulphonic acid in 225 parts of water is added within 1 hour and the acid liberated is neutralized by the simultaneous addition dropwise of 15% aqueous sodium carbonate solution until the pH of the reaction mixture is 6-6.5. The whole is then stirred at the same temperature and pH until no more alkali is used and no more free amino groups can be traced. At 75-80", 14.5 parts of 2,6- dimethyl morpholine and an aqueous solution of 4 parts of sodium hydroxide are then added simultaneously, within 30 minutes, to the pale grey, viscous reaction mass. After adding another 0.8 part of sodium hydroxide, the mixture is stirred for 1 hour at and, after cooling, the almost white reaction product is filtered 01f, washed with water and dried in vacuo at 80. The product is identical with that according to Example 1.

Example 20 12 parts of aniline are added to 43.5 parts of the sodium salt of 4,4-bis-[4"-chloro-6-( 2,6 dimethylmorpholino) 1",3",5 triazinyl (2) amino] stilbene- 2,2 disulphonic acid in 800 parts of water. The pH of the mixture is adjusted to 5 .5 with a few drops of hydrochloric acid and then the mixture is heated for 10 hours at while stirring. The difficultly soluble 4,4 bis-[4"- phenylamino 6 (2,6 dimethylmorpholino) 1",3", 5" triazinyl-(2") amino] stilbene 2,2 disulphonic acid formed is filtered off, suspended in 700 parts of water, 4.8 parts of sodium hydroxide and 10 parts of sodium carbonate are added and the whole is heated in a closed vessel for 3 hour at -130.

In this way, the disodium salt of the reaction product mentioned is obtained as almost colourless crystals which are difiicultly soluble in water. After cooling, the product is washed with water and dried in vacuo at 80.

Example 21 A heavy-duty, non-soap detergent mixture consisting of 8 parts of lauryl sulphate, 11 parts of dodecylbenzene sulphonate, 11 parts of sodium tripolyphosphate, 17 parts of tetrasodium pyrophosphate and 37 parts of sodium sulphate is worked up into a paste with 0.2 part of the brightener according to Example 1 in the form of its disodium salt in parts of water. This paste is dried at 60 and then milled. The washing powder obtained has a considerably more white appearance in daylight than one produced without the addition of the optical brightener.

Beautiful white washing powders are also obtained if, instead of the brightener mentioned above, the disodium salt of one of the brighteners given in Examples 2, 5, 12 or 18 is incorporated into the above washing agent preparation and otherwise the procedure given in the example is followed.

Example 22 1 part of cotton household goods is washed for 20 minutes at 80 in parts of a liquor which contains, per litre, 8 g. of the detergent produced according to Example 21; the goods are then rinsed and dried. A dazzling white wash is obtained. Even after repeated washing with this detergent, the goods treated show a very good brightening eflect and no undesirable change in shade due to accumulation of brightener.

Example 23 0.3 part of the brightener according to Example 1 in the form of its disodium salt are stirred with 3 parts by volume of 1 N sodium hydroxide solution and 100 parts by volume of water are added. To this mixture, a heavy duty detergent of the following composition is added:

7.8 parts of lauryl sulphate,

11.0 parts of dodecyl benzene sulphonate,

11.0 parts of sodium tripolyphosphate (NZP3O10), 16.6 parts of tetrasodium pyrophosphate,

4.6 parts of anhydrous sodium silicate,

1.4 part of carboxymethyl cellulose,

36.8 parts of sodium sulphate, and

8.0 parts of sodium perborate (NaBO -4H O).

The mixture obtained is then stirred into a homogeneous paste, dried at 85", then crushed and finally passed through a sieve.

The washing powder obtained has a considerably more white appearance in daylight than the same powder produced without the addition of the brightener mentioned above.

Example 24 A washing powder of the following composition is produced according to Example 23:

15.2 parts of dodecylbenzene sulphonate,

3.8 parts of lauryl sulphate,

25.6 parts of sodium tripolyphosphate,

7.6 parts of tetrasodium pyrophosphate,

4.8 parts of anhydrous sodium silicate,

1.9 part of magnesium silicate,

5.0 parts of sodium carbonate,

1.4 part of carboxylmethyl cellulose,

0.3 part of the sodium salt of ethylenediamine tetraacetic acid 34.4 parts of sodium sulphate, and

0.25 part of the brightener according to Example 5 in the 10 Example 25 The components are well mixed and dried in a spray dryer.

A beautiful white, free-flowing washing powder is obtained which is excellently suitable for the simultaneous washing and optical brightening of cotton.

Example 26 A non-ionogenic washing agent is produced by intimately mixing the following components:

11.0 parts of nonylphenol polyglycol ether containing 15 ethyleneoxy groups,

11.0 parts of water,

33.0 parts of sodium tripolyphosphate,

11.0 parts of tetrasodium pyrophosphate,

10.0 parts of sodium silicate,

20.0 parts of sodium sulphate,

2.0 parts of sodium carbonate,

2.0 parts of carboxymethyl cellulose, and

0.35 part of the disodium salt of the brighter according to Example 15.

Cotton washed at 70 with a liquor containing 5 g. per litre of the above washing agent is given a pure white appearance.

Example 27 A light-duty detergent is produced as follows:

20.0 parts of sodium dodecylbenzene sulphonate,

8.0 parts of sodium lauryl sulphate,

2.0 parts of lauric acid mono-N-fl-hydroxyethylamide,

8.0 parts of sodium tripolyphosphate,

1.5 parts of carboxymethyl cellulose,

60.5 parts of sodium sulphate 0.35 part of the disodium salt of the brightener according to example 1 and 80.0 parts of water.

The components are stirred into a homogeneous slurry, dried at 60 and then pulverised.

A pure white washing powder is obtained which can be used for the washing and brightening of cotton and rayon fabrics.

This washing powder also has a considerably more strong white shade in daylight than a washing powder of the same composition produced without the addition of the brightener.

75 parts of 2,4,6-trichloro-1,3,5-triazine are dissolved in 700 parts by volume of acetone. The solution is poured into 1800 parts of a mixture of ice and water while stirring. A solution of 82.8 parts of the sodium salt of 1 1 4,4'diaminostilbene-2,2'-disulphonic acid and 21.5 parts of sodium carbonate in 950 parts of Water is poured into 12 Example 41 the suspension so obtained of the triazine mentioned. The addition is made within 1 hour at 5 while stirring well. At 25, a solution of 69.2 parts of 4-sulphophenylamine and 16 parts of sodium hydroxide in 400 parts of water is added within 30 minutes to the yellowish suspension formed of the disodium salt of 4,4-bis-[4",6"-clichlorol",3,5" triazinyl (2") amino] stilbene 2,2- disulphonic acid and the acid liberated is neutralised by the simultaneous addition of an aqueous solution of 22 parts of sodium carbonate. The reaction mixture is then stirred at 3040 until the 4-sulphophenylamine has completely disappeared. 120 parts of 2,6-dimethyl morpholineare added to the mixture obtained within minutes at 50-60". The temperature of the reaction mixture is then raised to 90 and the acetone is distilled ofi through a sloping condenser. The solution obtained is then stirred for 1 hour at 90-100 and the pH of the solution is kept at 8.5 to 9 by the addition of sodium hydroxide. 25% of sodium chloride (calculated on the volume of the solution) is then added to the solution at 70 and the whole is stirred for another hour at this temperature. The disodium salt of the compound of the above formula separates out.

After cooling, this salt is filtered off, washed with sodium chloride solution and dried at 80 A water soluble, yellowish powder is obtained, the diluted solution of which fiuoresces bluish in daylight. The composition obtained can be used in the usual way for the optical brightening of cellulose and polyamide fibres.

If, instead of 4-sulphophenylamine, one of the arylamines given below is used and otherwise the procedure given in the example is followed, then optical brighteners having similar properties are obtained.

75 parts of 2,4,6-trichloro-l,3,5-triasine are dissolved in 700 parts by volume of acetone. The solution is poured, while stirring, into 1800' parts of a mixture of ice and water. A solution of 82.1 parts of the sodium salt of 4,4- diaminostilbene-Z,2-disulphonic acid and 21.5 parts of sodium carbonate in 950 parts of water is poured into the suspension obtained of the triazine mentioned. The addition is made with 1 hour at 0-5" while stirring well. 300 parts of sodium chloride are added to the yellowish suspension formed of the disodium salt of 4,4'-bis-[4", 6" dichloro l,3",5 triazinyl (2") aminoJ-stilbene-2,2-disulponic acid and the disodium salt mentioned is filtered off. This is slurried in 400 parts of ethylene glycol monomethyl ether at 0-5 and a solution of 16.8 parts of sodium hydroxide, 40 parts by volume of Water and parts by volume of ethylene glycol monomethyl ether is added within 1% hours. The whole is stirred for 12 hours at 0l0, then 110 parts of 2,6-dimethyl morpholine are added and the whole is heated for 1 /2 hours at 85-90". The yellowish solution is clarified while hot, concentrated in vacuo to 300 to 350 parts, dissolved with 1000 parts of water and 200 parts of sodium chloride are added whereupon the disodium salt of the compound of the compound of the above formula separates out on cooling. The product obtained is isolated and dried at 80.

A yellowish powder is obtained which dissolves well in water. Its diluted solution fiuoresces blue-violet in daylight. The product has good afiinity to cellulose fibres and, because of its good tolerance with acid aluminium salts, it can be used for the optical brightening of sized paper in the pulp.

If, instead of ethylene glycol monomethyl ether, one of the alcohols mentioned below is used and otherwise the procedure given in the example is followed, then optical brighteners having similar properties are obtained.

Example: 50 Example:

y p p l 42ethylene glycol monoethyl ether y p p y l 43ethylene glycol mon-opropyl ether 3l-4-methyl-3-sulphophenylam1ne 441,2-propylene glycol monomethyl ether 322,5-dimethyl-4-sulphophenylamine 45l,2-propylene glycol monoethyl ether 333-sulphophenylamine 461,2-propylene glycol monopropyl ether 343-methoxy-4-sulphophenylamine 471,4-butylene glycol monomethyl ether 353-ethoxy-4-sulphophenylamine 48ethy1ene 8 3 36-3-chloro-4-sulphophenylamine 'P PY glycol 372-chloro-S-methyl-4-sulphophenylamine 5 M1 3'PrOPYlene glYcOl 382,5-dichloro-4sulphophenylamine Example 51 on, on

CH(,11, CH CH 3 9-4-carb oxyphenylamine 40-3-carboxyphenylamine.

18.9 parts of 2,4-dichloro-6-methoxy-1,3,5-triazine (produced from methanol and 2,4,6-trichloro-l,3,5-trithen, at 46, 50 parts of sodium chloride are added. The

precipitated disodium salt of 4,4-bis-[4-chloro-6"-methoxy 1",3,5" triazinyl (2")-amino]-stilbene-2,2-disulphonic acid is filtered off and washed once with sodium chloride solution. The moist disodium salt so obtained is slurried in 500 parts by volume of water and parts of 2,6-dimethyl morpholine are added to the sus- 14 (2")-amino]-stilbene-2,2-disulphonic acid formed is filtered off, slurried in 2000 parts of water, 100 parts of 2,6- dimethyl morpholine are added and the whole is heated for 2 hours at 90-95 The yellowish solution obtained is clarified and the reaction product is salted out by the addition of 200 parts of sodium chloride. After drying, the disodium salt of the disulphonic acid of the above formula is obtained as yellowish, water soluble powder, the aqueous solution of which can be used for the brightening of cellulose material.

If instead of methyl mercaptan, equivalent amounts of ethyl-, propyl-, or 2 hydroxyethylmercaptan are used then, with otherwise the same procedure, corresponding end products having similar properties are obtained.

90", clarified at 85 and the reaction product is salted out with 15% of sodium chloride (calculated on the volume of the mixture). It is filtered off and dried.

The disodium salt of the compound of the above formula is a pale yellowish coloured, water soluble powder which, due to its good affinity to cellulose and good stability to acid, can be used for the optical brightening of cotton fabrics from a synthetic resin finishing bath.

If, instead of 2,4-dichloro-6-methoxy-1,3,5-triazine, equivalent amounts of 2,4-dichloro-6-ethoxy-1,3,5-triazine are used, then the disodium salt of 4,4-bis-[4"-(2,6-dimethylmorpholino) 6" ethoxy 1",3",5"-triazinyl- (2")-amine]-stilbene-2,2-disulphonic acid is obtained with otherwise the same procedure.

morpholine are poured in within 10 minutes. Then, at 15,

a 15 aqueous solution of parts of sodium carbonate is added in such a way that the pH of this mixture is 89, A clear yellowish solution is obtained. After adding 100 parts of sodium chloride, the whole is stirred for 12 hours at 2030. The disodium salt of the compound of the above formula forms a pale yellowish precipitate which Example 52 can easily be filtered off. After drying at 70, the prodsoan son;

A suspension in water and acetone of the disodium salt of 4,4 bis [4",6" dichloro-l",3",5"-triazinyl-(2)- amino]-stilbene-2,2'-disulphonic acid is produced as described in Example 1 from parts of 2,4,6-trichloro-1,3, S-triazine, 82.2 parts of the sodium salt of 4,4-diaminostilbene 2,2'-disulphonic acid and 21.5 parts of sodium carbonate. At 5-l0, a solution of 20 parts of methyl mercaptan and 16 parts of sodium hydroxide in 200 parts of water is added within 20 minutes and the whole is stirred for 12 hours at 2025. After the addition of 300 uct is obtained as a yellowish powder which has relatively good water solubility.

The diluted aqueous solution has a blue-violet fluorescence in daylight. The product is suitable for the optical brightening of nylon fabrics from a hot acid bath. As it has a certain aflinity to cellulose fibres and because of its good acid stability, it can also be used on cotton material from a bath containing synthetic resin.

Examples 5 4 parts of sodium chloride, the yellowish disodium salt of the 4,4 bis-[4"-chloro-6"-methy1thio-1,3",5"-triazinyl- 75 (2,6-dimethylmorpholino) 1,3",5" triazinyl (2")- 87 parts of disodium salt of 4,4'-bis-[4"-chloro-6"- amino]-stilbene-2,2'-disulphonic acid, produced according to Example 26, are heated with 30 parts of B-hydroxyethylarnine in 1800 parts of Water for 2 hours at 85-95 and the reaction product is salted out by the addition of 200 parts of sodium chloride.

After cooling, the disodium salt of the compound of the above formula is filtered off and dried at 80.

The disodium salt mentioned is a pale yellowish water soluble powder which can be used for the optical brightening of cellulose material from aqueous solution.

If instead of B-hydroxyethylamine, equivalent amounts of one of the following compounds are used, then with otherwise the same procedure, corresponding end products having similar properties are obtained.

Example 77 An aqueous slurry of 100 parts of cellulose in 4000 parts of water is mixed in a Hollander with an aqueous solution of 0.1 part of the brightener according to Example 41 for 15 minutes, 2 parts of resin milk and 3 parts of aluminum sulphate are added, the Whole is diluted with 20,000 parts of back water Which contains 1 g.

of aluminum sulphate per litre and the mass is made into paper sheets in the usual way, The paper sheets obtained are clearly brightened.

Example 78 To produce a paper loaded with white pigment, 0.10 part of the brightener obtained according to Example 28 are added to an aqueous slurry containing 85 parts of alpha-cellulose and 15 parts of China clay, the mass is then made up in the usual way into a paper pulp by adding 2 parts of resin milk and 4 parts of aluminum sulfate.

A loaded paper of White appearance is so obtained.

16 Example 79 Cotton poplin fabric is pad dyed at room temperature in a foulard with a liquor consisting of 535 parts of water, 150 parts of a 50% dimethylol urea preparation of the commercial name "Zeset S E. I. du Pont de Nemours, Wilmington, Del. USA, 15 parts of magnesium chloride and 2 parts of the brightening agent according to Example 51. The fabric is centrifuged to a liquor content of pre-dried at and condensed for 5 minutes at 140.

Cotton fabric of brilliant white appearance which has been given an anticrease processing is obtained.

Example parts of chemically pre-bleach ed perlon yarn are dyed for 40 minutes at 70 in a dye liquor, liquor ratio 1:40, Which contains 0.5 part of the brightening agent produced according to Example 53 and 3 parts of acetic acid.

After rinsing and drying, a brilliant White yarn is obtained.

Example 81 parts of a usual commercial 50% precondensate in paste form consisting of 80 parts of dimethylol urea and 20 parts of hexamethylol melamine, 10 parts of zinc chloride and 2 parts of the brightener given in Example 41, are dissolved in 1000 parts of Water and the pH of the solution is adjusted to 5.0 with acetic acid.

A pre-bleached regenerated cellulose fabric (viscose) is impregnated in a foulard with this solution, centrifuged to 90% liquor content, dried and condensed for 4 minutes at -140.

The anticrease finished fabric obtained has a pleasant white appearance.

Similar effects are obtained on using fabrics made of a mixture of cotton and polyester fibres instead of cotton.

By repeating Example 54, but using in lieu of the 30 parts of ,B-hydroxyethyl-amine employed therein, equimolar amounts of the sodium salt of the amino acids listed below, and otherwise repeating the aforesaid example except that 400 parts of sodium chloride are used for salting out the product, then the correspondingly substituted compounds falling under Formula IV are obtained.

Example:

82-amino-acetic acid 83methylamino-acetic acid 84-2-aminoethane-sulfonic acid 85-2- (N-methylamino -ethane-sulfonic acid 86-y-methylamino-propionic acid 876-arnino-butane-sulfonic acid.

We claim:

1. A White detergent powder, consisting essentially of an anionic or nonionic active detergent compound, and a phosphate selected from the group consisting of alkali polyphosphates and al-kali-polymetaphosphates, and an efiective brightening amount of a bis-triazinylaminostilbene optical brightener compound of the formula Ar-HN 17 18 wherein Ar represents a member selected from the group LEON D. ROSDOL, Primary Examiner consisting of phenyl, naphthyl-(l) and phenyl substituted by at least one of the following: halogen atoms, lower HALPERN Asslstant Exammer alkyl groups, lower alkoxy groups, lower alkanoylamino US Cl X groups. 5

25 2-5 43 References Cited UNITED STATES PATENTS 2,945,762 7/1960 Carroll et a1 260240 PAGE 1 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. D d Jan. 4, 1.972

. m Inventor) Hyman William Zussman and Heinrich Hauser ann It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

I Column 3, in the structure "CH-CH should read "CH CH-CH Column 8, in the structure "OH should read "CH @NH-O Column 8, Ex. 19, that part of the structure SO H should read Column 12, Example 51, that part of the structure ';CN

should read "C N" C N C C: N

Column 12 Example 51, that part of the structure "N C" should read "N C v C N N C DRM PO-IOSO (10-69) USCOMM-DC 60376-P69 9 US. GOVERNMENT PRINTING OFFICE: I969 0-366-334 PAGE 2 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3 r 2 491 Dated Jan. 4 1972 Inventor(s) Hyman William Zussman and Heinrich Hausermann It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Qfolumn 14, line 31, "775" should read "75".

Column 14, Example 54, "CH=OH" should read "CH=CH".

Column 15, Example 64, "2-(6-hydroxymethoxy) should read "2-(B-hydroxyethoxy) Signed and sealed this 6th day of February 1973.

(SEAL) Attest:

EDWARD M.P].,ETCHER,.IR. ROBERT GOTTSCHALK Attesting Officer Commissioner of Patents 'ORM PC4950 (10-69) uscoMM-Dc 60376-P69 U.S. GOVERNMENT PRINTING OFFICE: I969 O366-334 

